The Naval Battle of Guadalcanal took place from 12 to 15 November 1942 and was the decisive engagement in a series of naval battles between Allied (primarily American) and Imperial Japanese forces during the months-long Guadalcanal campaign in the Solomon Islands during World War II. The action consisted of combined air and sea engagements over four days, most near Guadalcanal and all related to a Japanese effort to reinforce land forces on the island. The only two U.S. Navy admirals to be killed in a surface engagement in the war were lost in this battle. Allied forces landed on Guadalcanal on 7 August 1942 and seized an airfield, later called Henderson Field, that was under construction by the Japanese military. There were several subsequent attempts to recapture the airfield by the Imperial Japanese Army and Navy using reinforcements delivered to Guadalcanal by ship, efforts which ultimately failed. In early November 1942, the Japanese organized a transport convoy to take 7,000 infantry troops and their equipment to Guadalcanal to attempt once again to retake the airfield. Several Japanese warship forces were assigned to bombard Henderson Field with the goal of destroying Allied aircraft that posed a threat to the convoy. Learning of the Japanese reinforcement effort, U.S. forces launched aircraft and warship attacks to defend Henderson Field and prevent the Japanese ground troops from reaching Guadalcanal. In the resulting battle, both sides lost numerous warships in two extremely destructive nighttime surface engagements. Nevertheless, the U.S. succeeded in turning back attempts by the Japanese to bombard Henderson Field with battleships. Allied aircraft also sank most of the Japanese troop transports and prevented the majority of the Japanese troops and equipment from reaching Guadalcanal. Thus, the battle turned back Japan's last major attempt to dislodge Allied forces from Guadalcanal and nearby Tulagi, resulting in a strategic victory for the U.S. and its allies and deciding the ultimate outcome of the Guadalcanal campaign in their favor. The Japanese decided on the evacuation of Guadalcanal the following month, which they completed by early February 1943. Guadalcanal was the last major naval battle in the Pacific War for the next one and one half years, until the Battle of the Philippine Sea. It was one of the costliest naval battles of the Second World War in terms of lives lost and most singularly unique in the history of modern navel warfare because of the close-range, almost point-blank, distances among the warships involved.
Background The six-month Guadalcanal campaign began on 7 August 1942, when Allied (primarily U.S.) forces landed on Guadalcanal, Tulagi, and the Florida Islands in the Solomon Islands, a pre-war colonial possession of Great Britain. The landings were meant to prevent the Japanese using the islands as bases from which to threaten the supply routes between the U.S. and Australia, to secure the islands as starting points for a campaign to neutralize the major Imperial Japanese military base at Rabaul, and to support the Allied New Guinea campaign. The Japanese had occupied Tulagi in May 1942 and began constructing an airfield on Guadalcanal in June 1942. By nightfall on 8 August, the 11,000 Allied troops secured Tulagi, the nearby small islands, and a Japanese airfield under construction at Lunga Point on Guadalcanal (later renamed Henderson Field). Allied aircraft operating out of Henderson were called the "Cactus Air Force" (CAF) after the Allied code name for Guadalcanal. To protect the airfield, the U.S. Marines established a perimeter defense around Lunga Point. Additional reinforcements over the next two months increased the number of U.S. troops at Lunga Point to more than 20,000 men. In response, the Japanese Imperial General Headquarters assigned the Imperial Japanese Army's 17th Army, a corps-sized command based at Rabaul and under the command of Lieutenant-General Harukichi Hyakutake, with the task of retaking Guadalcanal. Units of the 17th Army began to arrive on Guadalcanal on 19 August to drive Allied forces from the island. Because of the threat posed by CAF aircraft based at Henderson Field, the Japanese were unable to use large, slow transport ships to deliver troops and supplies to the island. Instead, they used warships based at Rabaul and the Shortland Islands. The Japanese warships—mainly light cruisers or destroyers from the Eighth Fleet under the command of Vice Admiral Gunichi Mikawa—were usually able to make the round trip down "The Slot" to Guadalcanal and back in a single night, thereby minimizing their exposure to air attack. Delivering the troops in this manner prevented most of the soldiers' heavy equipment and supplies—such as heavy artillery, vehicles, and much food and ammunition—from being carried to Guadalcanal with them. These high-speed warship runs to Guadalcanal occurred throughout the campaign and came to be known as the "Tokyo Express" by Allied forces and "Rat Transportation" by the Japanese.
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